The film follows Peter Highman (Robert Downey Jr.), a high-strung architect, who is on his way home to Los Angeles to witness the birth of his first child. However, his plans are derailed when he crosses paths with Ethan Tremblay (Zach Galifianakis), an eccentric and aspiring actor, at the airport. Due to a series of unfortunate events, both Peter and Ethan are placed on the “no-fly” list and are unable to board their flight.
In the climax, Peter reluctantly agrees to drive cross-country with Ethan, hoping to make it back to Los Angeles in time for the birth of his child. Along the way, they encounter various misadventures and obstacles, including a run-in with a drug dealer, a car accident, and a detour through the Mexican border.
As the plot unfolds, Peter and Ethan’s journey becomes increasingly chaotic and comedic, with their clashing personalities and misfortune leading to hilarious and unpredictable situations.
In the resolution, Peter and Ethan finally make it back to Los Angeles, just in time for the birth of Peter’s child. Despite their initial animosity towards each other, Peter comes to appreciate Ethan’s friendship and support during their journey. The film ends with Peter and Ethan parting ways, having formed an unlikely bond through their shared experiences.
“Due Date” is praised for its comedic performances, witty dialogue, and absurd humor. It offers a lighthearted and entertaining take on the classic road trip genre, with Downey Jr. and Galifianakis delivering standout performances as two unlikely companions navigating their way through a series of outrageous adventures.